A block-Toeplitz VCMA equalizer for MIMO-OFDM systems

In this paper we consider the problem of blind recovery of multiple OFDM signals in a MIMO system. The equalization algorithm is based on composite criterion which is able to cancel both inter-symbol interference (ISI) and inter-user interference (IUI). We propose a modified version of vector constant modulus algorithm (VCMA) which exploits the Toeplitz structure of the equalization matrix, in order to cancel the ISI. The IUI is mitigated by a second decorrelation criterion.

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